'''Theora''' is our video codec, based on the VP3 codec donated by [[On2 Technologies]]. We've refined and extended it, giving it the same future scope for encoder improvement [[Vorbis]] has. See http://theora.org/ for more information.

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'''Theora''' is a video codec, based on the [[VP3]] codec donated by [[On2 Technologies]]. We've refined and extended it, giving it the same future scope for encoder improvement [[Vorbis]] has. See http://theora.org/ for more information.

== Features ==

== Features ==

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Features available in the Theora Format (and a comparison to VP3 and MPEG-4 ASP):

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Features available in the Theora format (and a comparison to VP3 and MPEG-4 ASP):

Alpha 5 is the latest release. The bitstream format is frozen. Every file created with the alpha 3 encoder (and, of course, later encoders) will be playable with future decoders. Beta 1 will be the next release.

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* The bitstream format was frozen in 1.0 Alpha 3 on 2004-08-04: every file created with this encoder (and, of course, later encoders) will be playable by any compliant Theora decoder.

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* The decoder in 1.0 Alpha 8 implemented all features of the [http://theora.org/doc/Theora.pdf Theora Format Specification]: every file created by any compliant Theora encoder will be playable by the decoder in 1.0 Alpha 8 (and, of course, later decoders).

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* It would be nice if somewhere it could be explained if Theora is a format appropriate for editing video - such formats would not do frame to frame compression and the file size and processor load would be smaller. On the other hand a distribution format would want to pack in a lot of compression which would mean using frame to for compression.

== Development ==

== Development ==

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* [[Theora:Beta1ToDo|Todo for Beta1]]

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* [[OggTheora|Mapping in Ogg]]

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* [[TheoraTodo|ToDo list for development]]

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* [[Cortado/release|Release checklist for the Cortado java applet]]

== More information ==

== More information ==

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{{Template:Theora}}

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* [[TheoraHardware]]: List of hardware-players supporting Ogg Theora

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It's possible to convert VP3 video to Theora. See [[vp3toTheora]].

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* [[TheoraSoftwarePlayers]]: List of media players that can play Ogg Theora

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* [[TheoraDecoders]]: List of decoders

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* [[TheoraEncoders]]: List of encoders

== External links ==

== External links ==

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* [[Wikipedia: Theora]]

* [[Wikipedia: Theora]]

* [http://www.vp3.com VP3 homepage]: The homepage of the codec Theora is based on

* [http://www.vp3.com VP3 homepage]: The homepage of the codec Theora is based on

Latest revision as of 15:48, 8 August 2014

Theora is a video codec, based on the VP3 codec donated by On2 Technologies. We've refined and extended it, giving it the same future scope for encoder improvement Vorbis has. See http://theora.org/ for more information.

technologies used already in Vorbis (decoder setup configuration, bitstream headers...) not available in VP3

Status

1.1.1 is the latest stable release (2009-10-01).

The bitstream format was frozen in 1.0 Alpha 3 on 2004-08-04: every file created with this encoder (and, of course, later encoders) will be playable by any compliant Theora decoder.

The decoder in 1.0 Alpha 8 implemented all features of the Theora Format Specification: every file created by any compliant Theora encoder will be playable by the decoder in 1.0 Alpha 8 (and, of course, later decoders).